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Time-Distance Solar Far-Side Imaging Using Three-Skip Acoustic Signals |
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Stathis Ilonidis, Junwei Zhao, Thomas Hartlep
Abstract: The purpose of this work is to image solar far-side active regions using acoustic signals with three skips and improve the quality of existing images. The mapping of far-side active regions was first made possible using the helioseismic holography technique by use of four-skip acoustic signals. The quality of far-side images was later improved with the combination of four- and five-skip signals using the time-distance helioseismology technique. In this work, we explore the possibility of making three-skip far-side images of active regions, and improving the image quality by combining the three-skip images with the images obtained from existing techniques. A new method of combining images is proposed that increases the signal-to-noise ratio and reduces the appearance of spurious features.
To be published in Solar Physics.
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More information: http://arxiv.org/abs/0908.0962
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Last Updated: Monday, 5 October 2009, 12:52
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